Suppose I want to say
Follow this book not me
Would it be the right if the sentence was
Follow this book rather me
Suppose I want to say
Follow this book not me
Would it be the right if the sentence was
Follow this book rather me
The word "rather", in the sense of "instead of" requires a preposition to link it to the next word or sentence, which is than, so your sentence would be
Follow this book rather than me